Driving mechanism for sewing and other machines



IIWENTOR;

BY bl/WM chit- Patented Apr. 8,- 1884.

S. MAXIM.

(Nq Moclel.)

DRIVING MECHANISM FOR SEWING AND OTHER MACHINES.

V WITNBS SES ATTORNEYS 1 UNITED STATES Arniv'r FFIQEQ SAMUEL llIAXIllI, OF TVAYNE, MAINE, ASSIGNOR TO EDW ARD M. SMITH, OF PITTSFIELD, MASSACHUSETTS.

DRIVING 'MECHANlSM FOR SEWlNG AND OTHER MAHiNES.

SPECIFICATION forming part of Letters Patent No. 296,425, dated April 8, 1884.

Applicationfiled February 19, 1854. No model.)

simple, inexpensive, and efficient mechanismor motor for driving sewing or other machines by the aid of a treadle or hand-lever.

, The invention consists of a driving ring having a face groove, in which the heads of studs held in pivoted plates fitted in recesses of pivoted drive-links bite alternately at opposite sides of the drive-ring groove on reverse movements of the treadle or'lever, for imparting continuous rotary motion to a drivewheel in one direction.

The invention includes, also, special arrangements of parts of the device, whereby the links are guided at their outer ends and the stud-plates are stopped when the move ments of the links are reversed.

The invention comprises, also, other details of construction and combinations of parts, as will be hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specifi cation, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a front elevation of my improvement as applied to the drive-wheel of a sewing or other machine, and with the treadle connecting-rods and drive-wheel partly broken away. Fig. 2 is a cross-sectional elevation of the drive-ring on the line as m, Fig. 1, and through opposite arms of the drive-wheel. Fig. 3 is a fans view of the drive-ring and drive-wheel in part. Fig. 4 is a sectional view through the outer end of the left-hand drive-link, and to an enlarged scale. Fig. 5 is a perspective view of one of the drive-ring studs; and Fig. 6 is a diagram showing the action of the drive-studs in the drive-ring grooves in different positions of the links.

The letters a: indicate the spokes or body of the drive-wheel of av sewing or other machine, which wheel is mounted on a shaft, c,

I drive links in any approved way, and may have peripheral teeth or straight or grooved peripheral face to'receive a belt for transmitting its drivingpower.

To the drive wheel a, I fiX concentrically, by screws 0 or otherwise, the drive-ring b, which has a face-groove, d, in which the drivestuds 6 act, and an inside or undercut groove or way, f, to receive the outer ends of the g, for guiding the ends of the links and holding the studs 6 in the groove 01.

The inner ends of the links 9 are halved together loosely, and their opposing faces are cut away, as at g, to permit the links freely to swing up and down toward and from each other at their outer ends upon the shaft a as a central pivot, on which shaft the links may be loosely held against outward movement by any suitable pin or collar, 71, as in Fig. 2.

In the face of each link 9, near its outer end, 1 form a recess, t, one side, i, of which is about radial to the drive-ring b, or parallel with the edge of the link, and the other side, i is inclined, making the recess 13 wider at one end-in this case the outer end. At the smaller end of the recess 1' of each link 9 is fixed, on the square portion 6 of stud e, the small link or plate is, so that this plate and the stud shall turn together on the round portion 6' of the stud e, which is journaled in a bearing, l, of link g, to cause the angular oblong-or elliptical head 6 of stud e to bite or catch against the side walls of the groove d, to carry the drive-ring b and drive-wheel a forward in their revolution. The recessesi of opposite links are reversely arranged, so that their radial sides 11, which form stops to the movements of the plates is, are on oppo site sides of the longitudinal centers. of the links, (see Fig. 3,) and springs m may be provided to force the plates is against the sides i of the recesses, in which position of the plates k the heads e of the studs 6 may move freely in the slot (1. The plates are held in the recesses 73, and the studs 6 are held to the plates 76 by cap-screws 0, threaded into the end of the square part c of the studs. (See Fig. i.) At the ends opposite the studs 0 the plates is of oppositelinks, g, are pivoted on pins 1) to rods '1', which converge and connect IOU by a pivot-pin, s, to a treadle, t, or it may be a hand-lever, so that the motor may be worked by hand or foot, as desired.

The operation is as follows: In the drawings the links 9 g are in the middle position, and if the treadle is lowered the plate It at the right hand will be rotated slightly to cause its stud head 6 to bite the walls of slot d and carry the wheel forward in the direction of the arrow, while the opposite plate, It, being held by the edge 2" of recess, cannot cause its stud-head e to engage the slot. Thelinks 9 having been carried to the downward limit of their stroke to the dotted positions 2 2, Fig. 1, the treadle will be raised, which action carries the righthand plate is to the stop-edge 7; of its slot t, and releases its stud-head e from the walls of slot d, while theleft-hand plate 70 will be moved upward to cause its stud-head e to engage the walls of slot 01 at the opposite side of the drivering, and also drive-the wheel and ring in the direction of the arrow until the links reach the extreme upward. positions 3 3, whereupon on again lowering the treadle the left-hand studhead 0 will be free and the right-hand stud 6 will engage the slot to continue the rotation of- -the wheel. Suitable rubber or spring buffers,

20, are fitted in opposite edges of the links 9, to avoid noisy contact of the links at the limit of their movements in either direction. By my devices the drive-wheel can be revolved only in the one direction for which it is arranged,

however, the treadle may be moved, which is a desirable feature when my improvement is applied to sewing or other machines intended. to be started in one direction only.

The diagram, Fig. 6, illustrates the positions of the heads 6 of the studs 6 in slot (1 just prior to a reversal of the strokes of the treadle at the extremes of movement.

The power may be taken directly from the periphery of the drive-ring b, if desired, and the'motion of the drive-wheel may be caused in the reverse direction to that shown by applying the drive-ring and links to the reverse side of the drive-wheel.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A driving mechanism for sewing or other machines, constructed with a ring, b, forming or fixed to a drive-wheel, and having a slot, d, links g, reversely-set plates k, carrying studs 6, for engaging the walls of slot (1 at opposite side of the drive-ring alternately, to rotate the ring or wheel continuously in one direction by connecting-rods r and a treadle or lever, substantially as shown and described.

2. The combination, with the drive-ring b, of the pivoted links carrying the reverselyset plates it, [having the studs 6, for engaging the slot d of the ring D, and said ring having the groove f. in which the outer ends of the,

links 9 are guided, substantially as shown and described.

3. The links 9 g, halved together at their centers, recessed at g at their opposite faces, and carrying buflers w, in combination with the ring I) and means for moving the links, substantially as shown and described.

4. The combination, with the ring?), studs 0, links 9, and plates is, of the recesses a, shaped at i for reverselyset stops to the plates 70, substantially as shownand described.

5. The combination, with the ring I), studs e, links 9, and plates 70, of the springs 1%, substantially as shown and described.

6. The combination, with the ring I), link 9, and plates 70, of the stud 6, having a head, 6*,

for engaging the slot d of ring I), a round portion, 6 journaled in a bearing, Z, of the link 9, and asquare or angular end, 6', on which the plate 70 is rigidly fitted, substantially as shown and described.

7. The combination, with the ring I), link plate is, and stud e, of the screw 0, substantially as shown and described.

SAMUEL MAXIM.

Witnesses:

HENRY L. GooDwIN, O. SEDGWIOK. I g 

